package com.cw.config;

import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;

import java.util.List;


@Slf4j
@Configuration
public class WebMvcConfig extends WebMvcConfigurationSupport {
    //配置消息转换器，覆盖原来的
    @Override
    protected void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
        MappingJackson2HttpMessageConverter con = new MappingJackson2HttpMessageConverter();
        //把自定义的消息映射覆盖掉原来默认的消息映射
        con.setObjectMapper(new JacksonObjectMapper());
        //把自定义的消息转换器加入到消息转换器集合中， 生效顺序 index = 0
        converters.add(0,con);

        log.info("消息转换器准备完成");
    }
}
